Tool-holder.



A. COUSOT.

TOOL HOLDER.

APPLmATzoN FILED A1125, 1913.

Patented Dec. 2, 1913.

[www j? vwavf l /f/WL fm2-Www ACHILLE COUSOT, OF GENEVA, SWITZERLAND.

TOOL-HOLDER.

Specification of Letters Patent.

Application filed April 25, 1913.

Patented l) ec. 2, 1913.

Serial No. 763,655.

To all whom t may concern:

Be it known that l, ACHILLE Co'Uso'r, a citizen of the SwissConfederacy, and resident of Geneva, Switzerland, have invented certainnew and useful Improvements in Tool-Holders, of which the following is aspecilication.

The present invention relates to a device for firmly maintaining intheir holders helical metal turning tools taken in the bar of the classdescribed in the application, No. (371,436, led January 16, 1912, andthe improvements consist in the arrangement of the various partsmaintaining the tool within the holder, viz: The packing piece isinterposed between the tool and the clamping screw, the lower slottedportion of the tool holder on which portion bears the tool is removedfrein its holder and the special arrangement ot its spring for readilymoving or replacing said packing piece.

The invention is shown in the accompanying drawing, in which:

Figure 1 is a vertical section of the tool holder showing the tool andthe various clamping devices for maintaining said tool. Fig. 2 is asimilar section of the tool holder provided with a spring, all remainingparts being removed. Fig. 3 is a side view of the packing piece. Fig. 4is a section on line iv-B of Fig. 3.

rl`he tool 1, is engaged in a holder' 7c, and secured in position bymeans of a clamping screw o, bearing against the packing piece a, whichis under the action of a spring m.

The packing piece is trapezoidal and provided with a semi-eircular,projecting lug Z). Said lug b, is located in a corresponding groove b,provided in the body of the tool holder 7e, and works as a hinge andprevents the forward sliding motion of the packing piece when the toolis removed from the holder. The front face o, of the packing piece a,may be inclined so that the cuttings may freely roll up, but thisfeature is not needful in all cases, and said front face 0, may bestraight. The lower portion of the packing piece a, is slightly curvedat c, in order to provide a convenient resiliency and prevent the screwo from becoming damaged when the workman operates same too suddenly.

The two lower surfaces e and Z of the packing piece a, are worked so asto it exactly the corresponding surfaces of the tool, in order toprovide a positive clamping over a large surface. The tool holder isprovided with an are-shaped hollow la, so that two clamping sx'lriaces fand f/ having the shape ol the tool are provided in frontI of theclamping surilaces c and (Z of the packing piece (l. rlhe last piece isalso provided with a slot in, (Figs. 1, 3 and 1) extending -from theupper rear portion of the projection Z) to the lower arc-shaped portionc. rlhe depth o't said slot It (F ig. 4l) is such that the spring mslides without dilliculty alongside the inclined portion of the slot.The packing piece a. is withdrawn, the spring m strikes the lower frontof each ol5 the grooves b, as shown in Fig. 2, so that the end ot' saidspring is free. The packing piece a. (Fig. 3) is ready for being slidinto the tool holder. lVhen intro ducing the packing piece, the inclinededge ol the slot fn, bears against the tree end of the spring m and saidpiece may readily slide in the desired position shown in Fig. 1.

Having now fully described my said invention, what I claim and desire tosecure by Letters Patent, is:

1. A device for removably securing in its holder a metal turning tool,comprising a 'centrally slotted tool holder, a tool engaged in the slotof said holder', a hollow at one end ot said holder and opening in thecentral slot of saine, a removable packing piece fitting said hollow,means provided at said packing piece and said holder lier hingedly andresiliently connecting said packing piece with said tool holder, andmeans for firmly maintaining said tool between said packing piece andsaid holder.

2. A device for removably securing in its holder a metal turning tool,comprising a centrally slotted tool holder, a trapezoidal hollow at oneend of said holder and opening in the central slot of said holder, aremovable trapezoidal packing piece fitting said hollow, a semicircularprojecting lng at one 02E the upper edges oil said packing piece, acorrespondingly shaped groove pro* vided on said holder 'for receivingsaid lug7 a threaded bore on said holder and opening in said trapezoidalhollow, a clamping screw engaging said bore and hearing against saidpacking piece, arc-shaped hollows provided at the lower sui-:tace oitsaid packing piece and at the slotted surlace oi said holder, ground outsurfaces on both sides of each of said arc-shaped hollows for exactlyitting and pressing the adjacent portions of said tool when the Clampingscrew is opn testimony whereof I have hereunto set erated, a tiiangularslot at one side of the my hand in presence of two Witnesses. near end osaid trapezoidal packing piece,

and a spring secured on said holder and ACHILLE COUSOT bearing againstthe edge of said triangular `Witnessesz slot, in order to maintain saidpacking piece P. PICUDE,

when the tool is removed from its holder. E. PETRY.

Copies of this patent may be obtained for five centskeach, by addressingthe Commissioner of Patents, Washington, D. G.

